Cyclotrons2013 - List of Authors (Koeth, T.W.)

Paper

Title

Page

A Novel Optical Method for Measuring Beam Phase and Width in the Rutgers 12-Inch Cyclotron

299

J.L. Gonski, S. Burcher, T.W. Koeth, J.E. Krutzler, S. Lazarov
Rutgers University, The State University of New Jersey, Piscataway, New Jersey, USA
J. Beaudoin
UMD, College Park, Maryland, USA

We present an experimental longitudinal measurement of beam and phase slippage as a function of magnetic field deviation in a weak focusing field, using proton acceleration data from the Rutgers 12-inch cyclotron. A gated camera was used to determine beam arrival time from the radiation emitted by a fast ZnO:Ga doped phosphor target when struck by accelerated protons. Images integrated light emitted in 9 degree increments over a full 360-degree RF cycle. Analysis of relative image brightness allowed for the successful acquisition of relative phase shift and azimuthal beam width over several magnetic field strengths. Theoretical predictions and simulation via Poisson Superfish and SIMION software show good agreement with data, validating the optical method for qualitative measurements. This new method is independent of dee voltage and allows for measurements to be taken in the central region of the cyclotron, where other electrically based methods of measurement are challenging due to high RF electric fields. Such characteristics validate the use of gated camera imaging for cyclotron research, and motivate future refinement of this technique for a variety of studies.

Slides WE1PB04 [3.662 MB]

WEPPT024

Rutgers 12-Inch Cyclotron: Dedicated to Training Through Research and Development

366

T.W. Koeth, J.E. Krutzler, T.S. Ponter, A.J. Rosenberg, W.S. Schneider
Rutgers University, The State University of New Jersey, Piscataway, New Jersey, USA
D.E. Hoffman
PU, Princeton, New Jersey, USA

The Rutgers 12-Inch Cyclotron is a 1.2 MeV proton accelerator dedicated to beam physics instruction.[1] The 12-inch cyclotron project began as a personal pursuit for two Rutgers undergraduate students in 1995 and was incorporated into the Modern Physics Teaching Lab in 2001.[2] Since then, student projects have been contributing to the cyclotron’s evolution through development of accelerator components. Most of the Rutgers 12-Inch Cyclotron components have been designed and built in house, thus giving its students a research and development introduction to the field of accelerator physics and associated hardware.
[1] www.physics.rutgers.edu/cyclotron
[2] T. Feder, “Building a Cyclotron on a Shoe String,” Physics Today, 30-31 (November 2004)

WE1PB02

The Rutgers Cyclotron: Placing Student's Careers on Target

291

K.J. Ruisard
Rutgers University, The State University of New Jersey, Piscataway, New Jersey, USA
G.A. Hine, T.W. Koeth
UMD, College Park, Maryland, USA
A.J. Rosenberg
Stanford University, Stanford, California, USA

The Rutgers 12” Cyclotron is an educational tool used to introduce students to the multifaceted field of accelerator physics. Since its inception, the cyclotron has been under continuous development and is currently incorporated into the modern physics lab course at Rutgers University, as a semester-long mentored project. Students who participate in the cyclotron project receive an introduction to topics such as beam physics, high voltage power, RF systems, vacuum systems and magnet operation. Student projects have led to three different focusing pole geometries, including, most recently, a spiral edged azimuthally varying field (AVF) configuration. The Rutgers Cyclotron is often a student’s first encounter with an accelerator, and has inspired careers in accelerator physics.

Slides WE1PB02 [14.090 MB]

WEPPT025

Beam Physics Demonstrations with the Rutgers 12-Inch Cyclotron

369

T.W. Koeth
UMD, College Park, Maryland, USA

The Rutgers 12-Inch Cyclotron is a research grade accelerator dedicated to undergraduate education.[1] From its inception, it has been intended for instruction and has been designed to demonstrate classic beam physics phenomena. The machine is easily reconfigured, allowing experiments to be designed and performed within one academic semester. Our cyclotron gives students a hands-on opportunity to operate an accelerator and directly observe many fundamental beam physics concepts, including axial and radial betatron motion, destructive resonances, weak and azimuthally varying field (AVF) focusing schemes, DEE voltage effects, and more.

Paper	Title	Page
WE1PB04	A Novel Optical Method for Measuring Beam Phase and Width in the Rutgers 12-Inch Cyclotron	299
	J.L. Gonski, S. Burcher, T.W. Koeth, J.E. Krutzler, S. Lazarov Rutgers University, The State University of New Jersey, Piscataway, New Jersey, USA J. Beaudoin UMD, College Park, Maryland, USA
	We present an experimental longitudinal measurement of beam and phase slippage as a function of magnetic field deviation in a weak focusing field, using proton acceleration data from the Rutgers 12-inch cyclotron. A gated camera was used to determine beam arrival time from the radiation emitted by a fast ZnO:Ga doped phosphor target when struck by accelerated protons. Images integrated light emitted in 9 degree increments over a full 360-degree RF cycle. Analysis of relative image brightness allowed for the successful acquisition of relative phase shift and azimuthal beam width over several magnetic field strengths. Theoretical predictions and simulation via Poisson Superfish and SIMION software show good agreement with data, validating the optical method for qualitative measurements. This new method is independent of dee voltage and allows for measurements to be taken in the central region of the cyclotron, where other electrically based methods of measurement are challenging due to high RF electric fields. Such characteristics validate the use of gated camera imaging for cyclotron research, and motivate future refinement of this technique for a variety of studies.
	Slides WE1PB04 [3.662 MB]

WEPPT024	Rutgers 12-Inch Cyclotron: Dedicated to Training Through Research and Development	366
	T.W. Koeth, J.E. Krutzler, T.S. Ponter, A.J. Rosenberg, W.S. Schneider Rutgers University, The State University of New Jersey, Piscataway, New Jersey, USA D.E. Hoffman PU, Princeton, New Jersey, USA
	The Rutgers 12-Inch Cyclotron is a 1.2 MeV proton accelerator dedicated to beam physics instruction.[1] The 12-inch cyclotron project began as a personal pursuit for two Rutgers undergraduate students in 1995 and was incorporated into the Modern Physics Teaching Lab in 2001.[2] Since then, student projects have been contributing to the cyclotron’s evolution through development of accelerator components. Most of the Rutgers 12-Inch Cyclotron components have been designed and built in house, thus giving its students a research and development introduction to the field of accelerator physics and associated hardware. [1] www.physics.rutgers.edu/cyclotron [2] T. Feder, “Building a Cyclotron on a Shoe String,” Physics Today, 30-31 (November 2004)

WE1PB02	The Rutgers Cyclotron: Placing Student's Careers on Target	291
	K.J. Ruisard Rutgers University, The State University of New Jersey, Piscataway, New Jersey, USA G.A. Hine, T.W. Koeth UMD, College Park, Maryland, USA A.J. Rosenberg Stanford University, Stanford, California, USA
	The Rutgers 12” Cyclotron is an educational tool used to introduce students to the multifaceted field of accelerator physics. Since its inception, the cyclotron has been under continuous development and is currently incorporated into the modern physics lab course at Rutgers University, as a semester-long mentored project. Students who participate in the cyclotron project receive an introduction to topics such as beam physics, high voltage power, RF systems, vacuum systems and magnet operation. Student projects have led to three different focusing pole geometries, including, most recently, a spiral edged azimuthally varying field (AVF) configuration. The Rutgers Cyclotron is often a student’s first encounter with an accelerator, and has inspired careers in accelerator physics.
	Slides WE1PB02 [14.090 MB]

WEPPT025	Beam Physics Demonstrations with the Rutgers 12-Inch Cyclotron	369
	T.W. Koeth UMD, College Park, Maryland, USA
	The Rutgers 12-Inch Cyclotron is a research grade accelerator dedicated to undergraduate education.[1] From its inception, it has been intended for instruction and has been designed to demonstrate classic beam physics phenomena. The machine is easily reconfigured, allowing experiments to be designed and performed within one academic semester. Our cyclotron gives students a hands-on opportunity to operate an accelerator and directly observe many fundamental beam physics concepts, including axial and radial betatron motion, destructive resonances, weak and azimuthally varying field (AVF) focusing schemes, DEE voltage effects, and more.